<template>
  <view class="tui-org__horizontal">
    <view>
      <view v-for="(item, index) in options" :key="index" class="tui-orgh__item">
        <view v-if="!item.isOrgRoot" :style="[getStyles(item.height,index)]" class="tui-node__vertical-line">
        </view>
        <view v-if="!item.isOrgRoot" :style="{background:lineColor || borderColor,width:toPx(lineWidth)+'px'}"
              class="tui-node__horizontal-line"></view>
        <view
            :class="{'tui-org__item-border':borderColor && borderColor!==true && borderColor!=='true' && borderColor!=='transparent'}"
            :style="{width:width!=0 ? width+'rpx':'auto',height:itemHeight+'px',paddingLeft:(width!=0?4:toPx(padding))+'px',paddingRight:(width!=0?4:toPx(padding))+'px',borderRadius:radius+'rpx',background:background,borderColor:borderColor}"
            class="tui-orgh__node-item"
            @tap.stop="handleClick(item)">
          <text :class="{'tui-org__item-hidden':width!=0}" :style="{fontSize:size+'rpx',color:color}"
                class="tui-orgh__node-text">{{ item[fields[0] || 'text'] }}
          </text>
        </view>
        <view v-if="item[fields[1] ||'children']&&item[fields[1] ||'children'].length !== 0"
              :style="{background:lineColor || borderColor,width:toPx(lineWidth)+'px'}"
              class="tui-node__horizontal-line"></view>
        <tui-org-horizontal v-if="item[fields[1] ||'children']&&item[fields[1] ||'children'].length !== 0"
                            :background="background" :borderColor="borderColor" :color="color" :fields="fields"
                            :gap="gap" :height="height" :lineColor="lineColor" :lineWidth="lineWidth"
                            :padding="padding"
                            :radius="radius" :root="false" :size="size"
                            :treeData="item[fields[1] ||'children']"
                            :width="width"
                            @click="handleClick"></tui-org-horizontal>
      </view>
    </view>
  </view>
</template>

<script>
export default {
  name: "tuiOrgHorizontal",
  emits: ['click'],
  options: {
    virtualHost: true
  },
  props: {
    treeData: {
      type: Array,
      default() {
        return []
      }
    },
    fields: {
      type: Array,
      default() {
        return ['text', 'children']
      }
    },
    width: {
      type: [Number, String],
      default: 0
    },
    height: {
      type: [Number, String],
      default: 80
    },
    padding: {
      type: [Number, String],
      default: 24
    },
    radius: {
      type: [Number, String],
      default: 0
    },
    background: {
      type: String,
      default: '#fff'
    },
    size: {
      type: [Number, String],
      default: 32
    },
    color: {
      type: String,
      default: '#000'
    },
    borderColor: {
      type: String,
      default: '#555'
    },
    lineWidth: {
      type: [Number, String],
      default: 88
    },
    lineColor: {
      type: String,
      default: '#555'
    },
    //调整内容上下间距
    gap: {
      type: [Number, String],
      default: 40
    },
    //组件内部使用属性，不可修改，主要用于区分组件递归样式问题
    root: {
      type: Boolean,
      default: true
    }
  },
  data() {
    return {
      options: [],
      itemHeight: 0
    };
  },
  created() {
    this.initData()
  },
  watch: {
    height(val) {
      this.initData()
    },
    treeData(val) {
      this.initData()
    }
  },
  methods: {
    initData() {
      this.itemHeight = this.toPx(this.height)
      this.options = this.treeData.map((item, index) => {
        return {
          isOrgRoot: index === 0 && this.root,
          ...this.adjustItem(item)
        };
      });
    },
    toPx(rpx) {
      let px = uni.upx2px(rpx)
      return px % 2 === 0 ? px : px + 1
    },
    getStyles(treeHeight, index) {
      let length = this.treeData.length;
      if (length == 1 || length == 0) {
        return {
          height: "0",
          background: this.lineColor || this.borderColor,
          display: "none"
        };
      } else {
        let height = 0;
        let marginTop = 0;
        let marginBtm = 0;
        if (index == 0) {
          height = treeHeight / 2;
          marginTop = height;
          return {
            height: `${height}px`,
            background: this.lineColor || this.borderColor,
            marginTop: `${marginTop}px`
          };
        }
        if (index == length - 1) {
          height = treeHeight / 2;
          marginBtm = height;
          return {
            background: this.lineColor || this.borderColor,
            height: `${height}px`,
            marginBottom: `${marginBtm}px`
          };
        } else {
          height = treeHeight;
          return {
            background: this.lineColor || this.borderColor,
            height: `${height}px`
          };
        }
      }
    },
    adjustItem(item) {
      let children = item[this.fields[1] || 'children'];
      if (!children || children.length == 0) {
        item.height = this.itemHeight + this.toPx(this.gap);
      } else {
        children.map(model => {
          this.adjustItem(model);
        });

        item.height = children.reduce((preV, n) => {
          return preV + n.height;
        }, 0);
      }
      return item;
    },
    handleClick(e) {
      this.$emit('click', e)
    }
  }
}
</script>

<style scoped>
.tui-org__horizontal {
  display: flex;
}

.tui-node__vertical-line {
  display: inline-block;
  width: 1px;
  flex-shrink: 0;
}

.tui-orgh__item {
  display: flex;
  align-items: center;
}

.tui-node__horizontal-line {
  display: inline-block;
  height: 1px;
  flex-shrink: 0;
}


.tui-orgh__node-item {
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  /* #ifdef H5 */
  cursor: pointer;
  /* #endif */
  text-align: center;
  flex-shrink: 0;
}

.tui-orgh__node-text {
  width: 100%;
  text-align: center;
  display: block;
}

.tui-org__item-border {
  border: 1px solid;
}

.tui-org__item-hidden {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
</style>
